A very good idea for this project, but whether the developers are active or not, just what determines the success of the project.
It is very important for the developers to remain active, update users with new features to attract more followers and the investors remain interested in the project
Kepler is huge now they are highly aiming on advanced technologies as they already persist space-age architectures, management offices, mega factory, highly equipped laboratory, technological university and its campus at few situations they take time but they actively respond and proactively communicate as we could experience their strong hardwork to achieve a great success.